Finding the Fourth Proportional to 105,875.56, 146,106.44 and 58,128.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,875.56 : 146,106.44 = 58,128.56 : x
2. Step 2: Convert to fraction form
   105,875.56/146,106.44 = 58,128.56/x
3. Step 3: Cross multiply
   105,875.56x = 146,106.44 × 58,128.56
4. Step 4: Simplify right side
   105,875.56x = 8,492,956,963.93
5. Step 5: Solve for x
   x = 8,492,956,963.93/105,875.56
6. Step 6: Final answer
   x = 80,216.41